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Curvature Perturbations in Anisotropic Inflation with Symmetry Breaking · Around

2013

Curvature Perturbations in Anisotropic Inflation with Symmetry Breaking

Emami, Razieh, Firouzjahi, Hassan

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We study curvature perturbations in the anisotropic inflationary model with a complex scalar field charged under a $U(1)$ gauge field in Bianchi I universe.

Due to Abelian Higgs mechanism, the gauge field receives an additional longitudinal mode.
We verify that the dominant contributions into statistical anisotropies come from matter fields perturbations and one can neglect the contributions from the metric perturbations.
It is shown that the contribution of longitudinal mode into the statistical anisotropy power spectrum, though exponentially small, has an opposite sign compared to the corresponding contribution from the transverse mode.

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